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add second y axis in python

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. In matplolib for a time line diagram can I set to y-axis different values on the left and make another y-axis to the right with other scale? I want to right text to characterize this span for example 'This is span selector' how can I make it? You want twinx example.

The gist if it is:. Learn more. Asked 7 years, 4 months ago. Active 7 years, 4 months ago. Viewed 33k times. I am using this: import matplotlib. In span selector: plt. Helen Firs. Helen Firs Helen Firs 2 2 gold badges 4 4 silver badges 9 9 bronze badges. Scroll down to the second half of the accepted answer. Did you get this sorted out?

Active Oldest Votes. In your case I think you want: import matplotlib. What do you do about legend? I don't think the 'best' placement algorithm considers artists on other axes. Suppose I have the x, y1 and y2 lists of values where y2 is a transformation of y1. Instead of doing plot x, y1 and plot x, y2 which would result in 2 different curves, I want to have one curve for example from plot x,y1 using y1 as the left y-axis scale and y2 as the right y-axis scale.

Is that possible with twinx?

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I have a very simple question.

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I need to have a second x-axis on my plot and I want that this axis has a certain number of tics that correspond to certain position of the first axis. Let's try with an example. I would like to have another x-axis, on the top of my plot, showing the corresponding z for some values of the expansion factor. Is that possible? If yes, how can I have xtics ax. Answering your question in Dhara's answer comments: " I would like on the second x-axis these tics: 7,8,99 corresponding to the x-axis position 10, 30, Is that possible in some way?

From matplotlib 3. I'm forced to post this as an answer instead of a comment due to low reputation. I had a similar problem to Matteo. The difference being that I had no map from my first x-axis to my second x-axis, only the x-values themselves.

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So I wanted to set the data on my second x-axis directly, not the ticks, however, there is no axes. I was able to use Dhara's answer to do this with a modification:. Learn more. How to add a second x-axis in matplotlib Ask Question. Asked 8 years, 2 months ago. Active 7 months ago. Viewed k times. Brian Brian 8, 10 10 gold badges 52 52 silver badges 81 81 bronze badges. The functions you are using are not built in to python - I assume you are talking about matplotlib? If so, the question How do I plot multiple x or y axes in matplotlib?

See matplotlib. Active Oldest Votes. Daniele 1 1 silver badge 11 11 bronze badges. Hooked Hooked If you want to add a title as well, see this question: stackoverflow. Hooked, any idea if it is possible to this with one of the scales in log scale? This example works "by chance" since the xlims are between 0 and 1 the default. To make this work for arbitrary limits one also needs to make sure the limits of the two axes match with something like ax2. You can use twiny to create 2 x-axis scales.

For Example: import numpy as np import matplotlib. Dhara Dhara 5, 1 1 gold badge 27 27 silver badges 46 46 bronze badges.

I'm sorry but that's not what I've asked. I don't need to plot to functions on the same plot with different axis. I just need to have a second x-axis, on the top of my plot, ticked in correspondence of some special position on the first x-axis.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I hope one of you may be able to help. I have a plot with one y-axis value and one x-axis corresponding to these y values.

I want to add a second y-axis on the right hand side of the plot. How do I make a second y-axis which has its values determined by the y1 values, so that the y2 values correctly align with their y1 values on the y-axis? The scale of this axes can be set using its limits, ax2.

The values of y2min, y2max can be calculated using some known relationship e.

Multiple Axes in Python

From matplotlib 3. This takes care of synchronizing the limits automatically. As input one needs the conversion function and its inverse. Learn more. Adding a second y-axis related to the first y-axis Ask Question.

Asked 3 years, 3 months ago.

add second y axis in python

Active 1 year ago. Viewed 5k times. Active Oldest Votes. As answered by ImportanceOfBeingErnest in another questionit is possible to synchronize automatically the twin axes with ax. Oct 14 '19 at That comment is confusing, because in neither of the two options here you want to share any axes. You're right, I forgot to mention that the shared scale only makes sense if the second axes uses a functional formatter to display converted values. In particular for the first example of the answer, this would add ax2.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I can add a y label to the left y-axis using plt. Learn more. Adding a y-axis label to secondary y-axis in matplotlib Ask Question. Asked 7 years, 5 months ago.

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Active 2 years, 11 months ago. Viewed k times. Hooked Osmond Bishop Osmond Bishop 4, 9 9 gold badges 35 35 silver badges 46 46 bronze badges. Active Oldest Votes. The best way is to interact with the axes object directly import numpy as np import matplotlib. Paul H Paul H How to get the right y axis like the left one, I mean, from bottom to top, from 0 to 5, aligned.

How to rotate the blue text without overlapping the ticks? PaulH, I found that we can get the y limits from ax1 and set it up to ax2, so the position of labels will be aligned. There is a straightforward solution without messing with matplotlib: just pandas.

I know this was answered long ago, but I think this approach worths it. Thanks - great approach! However, it is worth noting that this only works if you plot on the primary y-axis first, then the secondary y-axis, exactly as you have done.

If you switch the order, it misbehaves. Micke Micke 2, 4 4 gold badges 31 31 silver badges 43 43 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Tales from documentation: Write for your clueless users. Podcast a conversation on diversity and representation. Upcoming Events. Featured on Meta.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Learn more. Second y-axis time series seaborn Ask Question. Asked 2 years, 7 months ago.

Active 4 months ago. Viewed 33k times. How can we plot both time series with two y-axis in seaborn?

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Ian Thompson 1, 1 1 gold badge 11 11 silver badges 20 20 bronze badges. Doe J.

add second y axis in python

Doe 2, 2 2 gold badges 12 12 silver badges 32 32 bronze badges. I would recommend not to use tsplot for a normal timeseries. See e. Just as it says, people think they should use tsplot for plotting their time-dependend data using a tsplotbut it has never actually been designed for that purpose. Also see this comment by the author of seaborn. Active Oldest Votes. I would recommend using a normal line plot. You can get a twin axes via ax. The OP does specify a seaborn solution though.

Also note that at the time this answer was written, seaborn did not have the lineplot function. As seaborn is built on the top of matplotlibyou can use its power: import matplotlib. Boris Yakubchik 1, 1 1 gold badge 15 15 silver badges 27 27 bronze badges.

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Andrey Sobolev Andrey Sobolev 9, 2 2 gold badges 38 38 silver badges 44 44 bronze badges. That seems to be a solution, but the legend is not consistent as the second will show up there. Sign up or log in Sign up using Google.

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I'm working with a Dash graph object and I'm fairly new to it.

add second y axis in python

I'm attempting to pass in a graph that has 2 scatter charts and a bar chart on the same figure but I'd like the bar chart green to be on it's own secondary y axis so it looks better than it does here:. Now from what I understand about Dash, I have to pass a go. Figure object so I have a function which defines the data and the layout. I saw in the plotly documentation that you can use plotly express add secondary axis but I'm not sure how to do that within my frame work here.

Any help would be greatly appreciated! This documentation page should be of use. Just modify to fit your code, since trace1 and trace2 appear to be on the same scale, just set trace3 to the secondary axis scale and you should be set.

Matplotlib.axes.Axes.secondary_yaxis() in Python

Below is an example with just only 2 but adding a third should not be too difficult. Learn more. Adding a secondary axis in Plotly Python Ask Question. Asked 11 months ago. Active 4 months ago. Viewed 5k times. I'm attempting to pass in a graph that has 2 scatter charts and a bar chart on the same figure but I'd like the bar chart green to be on it's own secondary y axis so it looks better than it does here: Now from what I understand about Dash, I have to pass a go.

Active Oldest Votes. MG92 MG92 2, 11 11 silver badges 24 24 bronze badges. Steve B Steve B 1 1 silver badge 6 6 bronze badges. I keep getitng fhr following: ValueError: plotly. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Tales from documentation: Write for your clueless users. Podcast a conversation on diversity and representation.

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Allow bountied questions to be closed by regular users. Visit chat. Hot Network Questions. Question feed.Click here to download the full example code. Sometimes we want as secondary axis on a plot, for instance to convert radians to degrees on the same plot.

We can do this by making a child axes with only one axis visible via Axes. This secondary axis can have a different scale than the main axis by providing both a forward and an inverse conversion function in a tuple to the functions kwarg:. In this case, the xscale of the parent is logarithmic, so the child is made logarithmic as well. Sometime we want to relate the axes in a transform that is ad-hoc from the data, and is derived empirically. In that case we can set the forward and inverse transforms functions to be linear interpolations from the one data set to the other.

A final example translates np. Total running time of the script: 0 minutes 1. Keywords: matplotlib code example, codex, python plot, pyplot Gallery generated by Sphinx-Gallery. Version 3. Quick search.

Related Topics Documentation overview. Show Page Source. Note Click here to download the full example code. This secondary axis can have a different scale than the main axis by providing both a forward and an inverse conversion function in a tuple to the functions kwarg: import matplotlib.

Note In this case, the xscale of the parent is logarithmic, so the child is made logarithmic as well. Last updated on May 18, Created using Sphinx 1. Doc version v3.